K&N Stubstack Air Horn 85-0400

Fits Holley 4150/4160 carburetors with the choke horn milled offFits inside the air cleaner housingIncreases the airflow by reducing restrictionReduces turbulence, improves metering accuracyThis K&N Stubstack is designed to be used with Holley 390-850 cfm square bore carbs (4150/4160), that have had the choke horn milled off and still use an air cleaner. Eliminates the need for hand polishing and radius work. Will work with all K&N Custom Chrome Racing Air Cleaners, including Tall Velocity Stack Air Cleaners. The K&N Stubstack is designed to increase the airflow of carburetors by decreasing the restriction around the choke horn. Product Specifications:Height 1.69 in (43 mm)Length 5.13 in (130 mm)Material Used PolyurethanePackage Quantity 1Product Box Height 3.7 in (94 mm)Product Box Length 10.4 in (264 mm)Product Box Width 10.1 in (257 mm)Product Style AccessoriesWeight 0 lb (0 kg)Width 5.13 in (130 mm)